<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="	https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css">
    <link rel="stylesheet" href="./bootstrap.min.css">
    <style>
        .red {
            color: red;
        }
    </style>
</head>

<body>
    <div id="app">
        <div class="container">
            <!-- 顶部搜索框模块 -->
            <div class="form-group">
                <div class="input-group">
                    <h4>品牌管理</h4>
                </div>
            </div>

            <!-- 数据表格 -->
            <table class="table table-bordered table-hover mt-2">
                <thead>
                    <tr>
                        <th>编号</th>
                        <th>资产名称</th>
                        <th>价格</th>
                        <th>创建时间</th>
                        <th>操作</th>
                    </tr>
                </thead>
                <tbody>
                    <tr v-for="(item,index) in list" :key="item.id">
                        <td>{{item.id}}</td>
                        <td>{{item.name}}</td>

                        <!-- 如果价格超过100，就有red这个类 -->
                        <td :class="{red:item.price>100}">{{item.price}}</td>
                        <td>{{item.time}}</td>
                        <td><a href="javaScript:;" @click.prevent="del(item.id)">删除</a></td>
                    </tr>
                    <tr style="background-color: #EEE">
                        <td>统计:</td>
                        <td colspan="2">总价钱为: {{totle}}</td>
                        <td colspan="2">平均价: {{per}}</td>
                    </tr>
                </tbody>
                <tfoot v-show="list.length<1">
                    <tr>
                        <td colspan="5" style="text-align: center">暂无数据</td>
                    </tr>
                </tfoot>
            </table>

            <!-- 添加资产 -->
            <form class="form-inline">
                <div class="form-group">
                    <div class="input-group">
                        <input type="text" class="form-control" placeholder="资产名称" v-model="name" />
                    </div>
                </div>
                &nbsp;&nbsp;&nbsp;&nbsp;
                <div class="form-group">
                    <div class="input-group">
                        <input type="text" class="form-control" placeholder="价格" v-model="price" />
                    </div>
                </div>
                &nbsp;&nbsp;&nbsp;&nbsp;
                <!-- 阻止表单提交 -->
                <button class="btn btn-primary" @click.prevent="add">添加资产</button>
            </form>
        </div>
    </div>
    <script src="./vue.js"></script>
    <script>
        const oldList = [{
                id: 100,
                name: "外套",
                price: 199,
                time: new Date('2010-08-12')
            },
            {
                id: 101,
                name: "裤子",
                price: 34,
                time: new Date('2013-09-01')
            },
            {
                id: 102,
                name: "鞋",
                price: 25.4,
                time: new Date('2018-11-22')
            },
            {
                id: 103,
                name: "头发",
                price: 19900,
                time: new Date('2020-12-12')
            }
        ]
        const app = new Vue({
            el: '#app',
            data: {
                name: "", // 名称
                price: 0, // 价格
                list: JSON.parse(localStorage.getItem('newList')) || oldList
            },
            methods: {
                add() {
                    if (this.name && this.price) {
                        if (typeof this.price === 'number') {
                            this.list.push({
                                id: this.list[this.list.length - 1].id + 1,
                                name: this.name,
                                price: this.price,
                                time: new Date()

                            })
                        }
                    }
                    this.name = ''
                    this.price = ''
                },
                del(id) {
                    return this.list = this.list.filter(item => item.id !== id)
                }
            },
            computed: {
                totle() {
                    return this.list.reduce((num, item) => num + item.price, 0)
                },
                per() {
                    if (this.list.length < 1) {
                        return 0
                    } else {
                        return this.totle / this.list.length
                    }

                }
            },
            watch: {
                list: {
                    deep: true,
                    handler(newValue) {
                        localStorage.setItem('newList', JSON.stringify(newValue))
                    }
                }
            }

        })
    </script>


</body>

</html>